1. Universitätsmedizin Mannheim; Vth Department of Medicine; Medical Faculty of the University of Heidelberg; Mannheim Germany
2. Division of Nephrology and Dialysis; Ospedale Maggiore di Milano IRCCS; Milano Italy
3. Landeskrankenhaus; University of Innsbruck; Innsbruck Austria
4. Katharinenhospital; Stuttgart Germany
5. Hospital Ramón y Cajal; Madrid Spain
6. Universitätsklinik des Saarlandes; Homburg Germany
7. Klinik für Nephrologie; University of Kiel; Kiel Germany
8. Universitätsklinik Münster; Münster Germany
9. Universitá di Padova; Padua Italy
10. Universitá di Vicenza; Vicenza Italy
11. Koehler eClinical GmbH; Freiburg Germany
12. Abteilung für Nephrologie; University of Regensburg; Regensburg Germany
13. Allgemeines Krankenhaus Wien; Medical University of Vienna; Austria
14. Hospital Marqués de Valdecilla; Santander Spain